Home / 20,912,125.86-31,380,465.96-8,780,656.43

Finding the Fourth Proportional to 20,912,125.86, 31,380,465.96 and 8,780,656.43

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Solution

The fourth proportional to 20,912,125.86, 31,380,465.96 and 8,780,656.43 is: 13,176,139.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912,125.86 : 31,380,465.96 = 8,780,656.43 : x
  2. Step 2: Convert to fraction form
    20,912,125.86/31,380,465.96 = 8,780,656.43/x
  3. Step 3: Cross multiply
    20,912,125.86x = 31,380,465.96 × 8,780,656.43
  4. Step 4: Simplify right side
    20,912,125.86x = 275,541,090,286,521.28
  5. Step 5: Solve for x
    x = 275,541,090,286,521.28/20,912,125.86
  6. Step 6: Final answer
    x = 13,176,139.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.